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https://issues.apache.org/jira/browse/SOLR-17294?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17947378#comment-17947378
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Mark Robert Miller commented on SOLR-17294:
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Houston already noted in the PR.
> The stall detection in the ConcurrentUpdateSolrClients easily detects false
> positives.
> --------------------------------------------------------------------------------------
>
> Key: SOLR-17294
> URL: https://issues.apache.org/jira/browse/SOLR-17294
> Project: Solr
> Issue Type: Bug
> Reporter: Mark Robert Miller
> Assignee: Mark Robert Miller
> Priority: Major
> Labels: pull-request-available
> Time Spent: 2h 10m
> Remaining Estimate: 0h
>
> The current stall detection mechanism in the ConcurrentUpdateSolrClients is
> prone to generating false positives, especially under load. As pointed out by
> Jason, the existing approach simply intermittently monitors the queue size
> over time to detect stalls. However, this method is insufficient because the
> queue can report being full for extended periods when the system is under
> load, even if no actual stall has occurred.
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